yard, bellevue, washington, USA
collection time: 7/15/2023
length: queens: 7-8 millimeters, workers: 3-6 millimeters
Color: black, shiny
Seems to be polygynous
some variation in worker size
nest was very large, and had alates
I found the nest raked apart, and I saw ants running in different directions. The colony was likely very big, and had multiple queens that were running away.